Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Microchip Technology/ATSAML11E14A/NVMCTRL/PARAM#0x0
PSZ=8
NVM Parameter
FLASH Pages
Page Size
0 (8): 8 bytes
1 (16): 16 bytes
2 (32): 32 bytes
3 (64): 64 bytes
4 (128): 128 bytes
5 (256): 256 bytes
6 (512): 512 bytes
7 (1024): 1024 bytes
DATAFLASH Pages
https://github.com/cmsis-svd/cmsis-svd-data